Quick answers
- Which hospitals does Stephen Chang work at?
- Medicare's official clinician data lists Stephen Chang at 2 hospitals: Stanford Health Care and Stanford Health Care Tri-Valley. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Stephen Chang see patients?
- Medicare's clinician data lists 2 practice locations, including Redwood City, CA and Stanford, CA. Call before your visit to confirm the address.
- What is Stephen Chang's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Internal Medicine.
- Does Stephen Chang accept Medicare assignment?
- Yes. Medicare's clinician data says Stephen Chang accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Stephen Chang offer telehealth?
- Medicare's clinician data says Stephen Chang offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Stephen Chang?
- (650) 369-5811, as listed in official Medicare / NPI Registry data.
- What is Stephen Chang's NPI number?
- 1417240227. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Stephen Chang works
Medicare's Facility Affiliation Data lists Stephen Chang at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Stanford Health CareStanford, CA · Acute Care Hospital · CCN 050441
- Stanford Health Care Tri-ValleyPleasanton, CA · Acute Care Hospital · CCN 050283
Practice locations
Addresses where Stephen Chang is enrolled with Medicare (CMS data updated 2026-10-02).
- 170 Alameda De Las PulgasRedwood City, CA 94062 (650) 369‑5811
- 300 Pasteur DrStanford, CA 94305 (650) 723‑4000
Group practices
Medicare enrollment lists Stephen Chang as a member of this group (CMS data updated 2026-10-02).
- Stanford Health Care3,122 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in California →
Other cardiologists in Redwood City
Clinicians with the same Medicare primary specialty in Redwood City, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Cincinnati College Of Medicine |
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1417240227 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians